Ball-bearing for lawn-mowers.



"0,707,298. Patented Aug. l9, I902.

A. B. use. 7

BALL BE ABING F08 LAWN MOWEBS.

(Application mod June as, 19013 (No llodel.)

UNITED STATES PATENT OFFICE.

ADELBERT B. CASE, OF SPRINGFIELD, MASSACHUSETTS.

BALL-BEARING FOR LAWN- 'MOWERS.

SPECIFICATION Application filed June 28, 1901.

To all whom it may concern.-

Be it known that I, ADELBERT B. Crisis, a citizen of the United Statesof America, residing at Springfield, in the county of Hampden and Stateof Massachusetts, have invented new and useful Improvements inBall-Bearings for Lawn-Mowers, of which the following is aspecification. v

This invention relates to ball-bearing devices for lawn-mowers and othermachines, the object being to provide improved means for preventing thederangement of the positions of the cooperating parts of said bearingsdue to the shocks produced by the frequent stopping and startingofthe'machine; and the invention consists in the peculiar constructionand arrangement of certain of said ball-bearing parts, all ashereinafter fully described,and more particularly pointed out in theclaims.

In the drawings forming part of this specification, Figure 1 is a sideelevation, partly in section, showing a part of the knife-carryingshaftwith a portion thereof broken away and parts of knives connectedtherewith, as usual, and illustrating in section the ballbearing coneand means for adjusting and fixing the same on said shaft. Fig. 2 is aplan view of a portion of said shaft and of the. cone thereon and of thecone-adjusting devices. I

In the drawings, referring to Fig. 1, is illustrated the usualdepression 10, formed in the side of the shaft 2, having inclinedbase-surfaces 12, against which bear the inner ends of the coneadjusting and locking screws 16 16, whereby the tapered end of the coneis rigidly held against the balls 15 of the shaft-bearing. The frequentloosening of said screws, due to the sudden and frequent reversal' ofthe rotary movements of knives of the machine, has heretofore been afrequent source of annoyance to the user, and to obviate suchinconvenience and to provide means for so interlocking said screws 16after adjusting the same that neither can become loosened and the cone13 be displaced the below-described device is applied to said screws, asshown. To one of said screws (the higher one) is applied a lock-nut 18,which may be forming part of Letters Patent No. 707,298, dated August19, 1902.

Serial No. 66,380. (No model.)

turned for adjustment by either a wrench or a fork shaped screw driver.After said screws shall have been turned to proper positions to lock thecone 13, as in Fig. 1, so that it shall engage the bearing-balls15, saidlock-nut is firmly screwed down against the upper end of the lowerscrew, as there shown. Screwing down said nut, as just described,carries the edge thereof with sufficient force against'said lower screwto cause the nut to be more or less canted, and thereby it becomes sobound on the higher screw that it resists anyaction whereby it maybecome loosened, and hence said cone, so far as the .action' of themachine is concerned, is thereby fixed in proper operative positionuntil again released by turning one of said screws. Should one wish toturn the screw, which is beneath and near the edge of the nut 18, asshown in Fig. 1, that may be done by using a screw-driver. Tomakeit'convenient to use the screw-driver, a curved recess 00 is made inthe edge of said nut. (See Fig. 2.) By turning said screw, as aforesaid,said nut and the screw on which it is are held with more or less forcein an adjusted position, and consequently the cone 13 is held immovableon the shaft 2.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is-

1. In lawn-mowers the combination with the ball-bearing adjustable conethereof, of

two cone-adj usting screws therein and means connected with one of saidscrews whereby both are locked in non-rotatable positions, substantiallyas described.

2. In lawn-mowers the combination with the ball-bearing adjustable conethereof, of two cone-adjusting screws therein, side by side, and alock-nut on one of said screws whose edge extends over the end of thesec 0nd one, for screw engagement therewith, whereby said nutbecomeslocked with both screws, substantially as described.

ADELBERT B. CASE.

